Open AccessEvaluation of the endocarp and epicarp extract of Cereus fricii cactus as a carbon steel corrosion inhibitor
Author(s) -
Ana García Guzmán,
Pedro Meza Castellar,
Candelaria Tejada Tovar,
Ángel Villabona-Ortíz,
Diofanor Acevedo Correa
Publication year - 2020
Publication title -
entre ciencia e ingenieria/entre ciencia e ingeniería
Language(s) - English
Resource type - Journals
eISSN - 2539-4169
pISSN - 1909-8367
DOI - 10.31908/19098367.1798
Subject(s) - chemistry , corrosion , cactus , phytochemical , fourier transform infrared spectroscopy , absorbance , nuclear chemistry , antioxidant , gravimetric analysis , bacillus cereus , carbon steel , chromatography , organic chemistry , botany , biochemistry , biology , chemical engineering , bacteria , genetics , engineering
Endocarp and pericarp extracts of Cereus fricii cactus were used to inhibit carbon steel corrosion in HCl and NaCl solutions by gravimetric assays. Extracts were mechanically obtained, concentrations were fixed and characterized by phytochemical testing and FTIR analysis, and the nature of inhibition was determined by calculation of Gibbs Free Energy. It was established that the extracts have the presence of tannins, saponins, and antioxidant compounds, which was corroborated by the FTIR analysis, showing peaks of absorbance corresponding to groups OH and COOH, with the endocarp extract presenting the highest proportion. Endocarp extracts with 5% concentration showed better performance in inhibiting corrosion than extracts obtained from epicarp, with percentages of 97.71 when inhibiting HCl and 73.91% with NaCl. The presence of tannins, saponins, and antioxidant compounds in extracts of the endocarp and epicarp favour inhibition of metal corrosion.